Question

if x^2+1/x^2=18,find x-1/x and x+1/x?​

Answer 1

नहीं आता है सर आंसर दो

Answer 2

Answer:

x^2+1/x^2=18

(x+1/x)^2-2.x.1/x=18

(x+1/x)^2-2=18

(x+1/x)^2=18+2=20

x+1/x=√20=2√5

again,

x^2+1/x^2=18

(x-1/x)^2+2.x.1/x=18

(x-1/x)^2=18-2=16

x-1/x=√16=4